Improve your concentration and relieve stress with EnSight Media's brainwave audio app, Brain Upgrade Premium. We also have a time management game that has you feeding hungry kids, and an interactive yoga app designed for children.

All app prices are subject to change at any time and without notice regardless of stated free duration. Price changes are solely under the control of the developers.

iPhone:

Super Stretch Yoga ($1.99 → Free, 81.7 MB): An interactive yoga app designed for children. Let Super Stretch and his friends guide your child through 12 different yoga poses. Each pose is performed by real-life children, making it easy for your own child to follow along. Super Stretch will also pop in to explain each pose and provide words of encouragement. The app also includes breathing breaks, inspiring music, and the ability to take team photos.

Super Stretch Yoga is available for free for a limited time. It has a 4.5-star rating with a total of 11 ratings.

Relax - Stress and Anxiety Relief ($2.99 → Free, 10.0 MB): Relieve your mental and physical stress with this health and fitness app. It guides you through deep breathing sessions with visual and audio cues. You can jump right into your session with the quick start mode, or you can get more hands-on and customize the length, ratio, and timing of your session. The app also includes a history log, five music options, and three themes.

Relax - Stress and Anxiety Relief is available for free for a limited time. It has a 4-star rating with a total of 34 ratings.

Brain Upgrade Premium - Improve Concentration and Relieve Stress ($0.99 → Free, 34.3 MB): Improve your concentration, relieve some of your stress, or just fall fast asleep with this audio app. It includes a collection of eight binaural beats, which are said to be able to guide your brain towards different states of mind. The beats can be played together with natural sounds and classical music as well. The app includes a timer, descriptions and images for each beat, and the ability to create custom mixes from 16 sounds and tunes.

Brain Upgrade Premium - Improve Concentration and Relieve Stress is available for free for a limited time. It has a 5-star rating with a total of 8 ratings.

Universal:

InsTrack Followers on Instagram - Discover Unfollowers, Mutual Friends and Fans ($0.99 → Free, 4.8 MB): Track your followers on Instagram with this social networking app. It allows you to discover who on Instagram is not following you back and who unfollowed you. It also allows you to track new followers, find mutual friends, view your fans, view your profile, and share the information you have collected. You need to have an active Instagram account in order to utilize this app.

InsTrack Followers on Instagram - Discover Unfollowers, Mutual Friends and Fans is available for free for a limited time. It has a 5-star rating with a total of 50 ratings.

Elf Defense Eng ($15 → Free, 58.3 MB): This eye-popping fixed-path tower defense game has you helping the peaceful elves defend their homeland from the invading human forces. Place your units anywhere along your enemy's path by first tapping on an open square and then choosing your tower or mercenary type. You can also use the coins you earn during battle to upgrade your towers. The game includes 100 enemy unit types, three gorgeous environments, 60 levels, special items, and leaderboards via Game Center.

Elf Defense Eng is available for free for a limited time. It has a 4-star rating with a total of 795 ratings.

DMD Panorama ($1.99 → Free, 3.4 MB): A photography app that allows you to quickly create and share panoramic images. Just hold your iPhone in portrait mode, tap the start button, and then rotate your device left or right. When the two shapes at the top of the screen form a circle, the app will snap another picture. Keep rotating until your image is complete. The app allows you to share your creations via Facebook, Twitter, and email.

DMD Panorama is available for free for a limited time. It has a 4.5-star rating with a total of 1957 ratings.

Pick'n'Chew ($0.99 → Free, 65.3 MB): This time management game requires you to keep your hungry visitors happy and healthy by serving them the correct type of organic food. Kids come streaming down the screen with trays in hand, and you must drag and drop the correct type of food onto their trays before they leave. You must also refill the containers and try to collect the coins that drop so you can upgrade your power-ups. The game includes two modes, objectives to complete, and achievements and leaderboards via Game Center.

Pick'n'Chew is available for free for a limited time. It has a 4.5-star rating with a total of 30 ratings.

ChinaTaxi ($0.99 → Free, 32.3 MB): Pick up passengers and get them safely to their destination in this fast-paced platformer. Johnny and Burger have started a taxi business in the capital city. It's your job to help them jump over and slide under obstacles while picking up passengers and bringing them to their destination as quickly as possible. Try to collect 100 gold coins during your run to activate an invincible rocket boost. The game includes three environments, and 30 levels to complete.

ChinaTaxi is available for free for a limited time. It has a 4.5-star rating with a total of 98 ratings.

iPad:

Super Stretch Yoga HD ($1.99 → Free, 62.1 MB): An interactive yoga app designed for children. Let Super Stretch and his friends guide your child through 12 different yoga poses. Each pose is performed by real-life children, making it easy for your own child to follow along. Super Stretch will also pop in to explain each pose and provide words of encouragement. The app also includes breathing breaks, inspiring music, and the ability to take team photos.

Super Stretch Yoga HD is available for free for a limited time. It has a 4.5-star rating with a total of 8 ratings.

Relax HD - Stress and Anxiety Relief ($2.99 → Free, 12.9 MB): Relieve your mental and physical stress with this health and fitness app. It guides you through deep breathing sessions with visual and audio cues. You can jump right into your session with the quick start mode, or you can get more hands-on and customize the length, ratio, and timing of your session. The app also includes a history log, five music options, and three themes.

Relax HD - Stress and Anxiety Relief is available for free for a limited time. It has a 4-star rating with a total of 25 ratings.

That concludes today's issue of Apps Gone Free. If you like staying on top of these daily deals, don't forget to check out our free AppsGoneFree app. It provides all the deals each day, and even an archive of past deals that are still active.

Developers:

If you are a developer who would like to get your app included in our “Apps Gone Free” daily lists, here’s our basic set of rules:

It must have at least a three-star average rating at the time it goes free.

The app must not have been free numerous times (3+) over the last six months.

The free version of your app must not include ads.

To submit an app, simply send a request to [email protected] with the subject “Apps Gone Free.” Please include the name of the app, a link to it in the App Store, when and for how long you intend to offer the app for free, and anything else you would like to share. We will take it from there.